TRB’s Transit Cooperative Research Program (TCRP) Web Only Document 70: Improving the Resilience of Transit Systems Threatened by Natural Disasters, Volume 1: A Guide offers practices for transit systems of all sizes to absorb the impacts of disaster, recover quickly, and return rapidly to providing the services that customers rely on to meet their travel needs. The report shows how to identify and implement appropriate resilience strategies to strengthen operations and infrastructure throughout an agency. It explores ways that agencies can become more resilient through incremental adjustments in planning and small changes in what they do every day. The guide also shows how to identify critical transit-related interdependencies and engage in broader regional resilience efforts.